Circuit aging detection sensor based on voltage comparison
US11125812B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2020 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Sep 28, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2882
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention discloses a circuit aging detection sensor based on voltage comparison. A control circuit generates an aging voltage signal, a standard voltage signal and a reference voltage signal. The aging voltage signal passes through a first voltage-controlled oscillator to generate an aging frequency signal. The standard voltage signal passes through a second voltage-controlled oscillator to generate a standard frequency signal. The standard frequency signal and the aging frequency signal pass through an aging detection circuit to generate a frequency difference signal. A level signal generated by a serial data detector passes through a beat-frequency oscillator to generate a reset signal. A counter quantizes aging information, which is converted by a digital-analog converter into a quantized voltage signal. The quantized voltage signal is compared with the reference voltage signal by a voltage comparator, to generate a hopping signal at a voltage superposition node, and an aging signal is output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.